Effects of inhomogeneous couplings between atoms and acavity field on entanglement dynamics

doi:10.1088/1674-1056/19/1/010310

中国物理B ›› 2010, Vol. 19 ›› Issue (1): 10310-010310.doi: 10.1088/1674-1056/19/1/010310

Effects of inhomogeneous couplings between atoms and acavity field on entanglement dynamics

郭金良, 夏岩, 宋鹤山

School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China

收稿日期:2009-05-11 修回日期:2009-06-08 出版日期:2010-01-15 发布日期:2010-01-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10875020).

Effects of inhomogeneous couplings between atoms and acavity field on entanglement dynamics

Guo Jin-Liang(郭金良)^†, Xia Yan(夏岩), and Song He-Shan(宋鹤山)

School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China

Received:2009-05-11 Revised:2009-06-08 Online:2010-01-15 Published:2010-01-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10875020).

摘要/Abstract

摘要： Based on the concept of concurrence, we have investigated the entanglement dynamics of two two-level atoms coupled to a single-mode cavity field with inhomogeneous couplings. We find that, for some initial states, the inhomogeneous couplings not only induce but also enhance the entanglement in the process of its evolution. In addition, considering the intrinsic decoherence proposed by Milburn, we also find that a proper value of inhomogeneous couplings can enhance the stationary entanglement, and as a result, the destructive effect of intrinsic decoherence on entanglement can be moderated by the inhomogeneous couplings.

Abstract: Based on the concept of concurrence, we have investigated the entanglement dynamics of two two-level atoms coupled to a single-mode cavity field with inhomogeneous couplings. We find that, for some initial states, the inhomogeneous couplings not only induce but also enhance the entanglement in the process of its evolution. In addition, considering the intrinsic decoherence proposed by Milburn, we also find that a proper value of inhomogeneous couplings can enhance the stationary entanglement, and as a result, the destructive effect of intrinsic decoherence on entanglement can be moderated by the inhomogeneous couplings.

Key words: entanglement evolution, intrinsic decoherence

中图分类号: (Entanglement and quantum nonlocality)

03.65.Ud

03.65.Yz (Decoherence; open systems; quantum statistical methods) 03.67.Mn (Entanglement measures, witnesses, and other characterizations)

郭金良, 夏岩, 宋鹤山. Effects of inhomogeneous couplings between atoms and acavity field on entanglement dynamics[J]. 中国物理B, 2010, 19(1): 10310-010310.

Guo Jin-Liang(郭金良), Xia Yan(夏岩), and Song He-Shan(宋鹤山). Effects of inhomogeneous couplings between atoms and acavity field on entanglement dynamics[J]. Chin. Phys. B, 2010, 19(1): 10310-010310.

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Effects of inhomogeneous couplings between atoms and acavity field on entanglement dynamics

Effects of inhomogeneous couplings between atoms and acavity field on entanglement dynamics

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